rails                  
                                          
                                          
  
                                          
  
                                          
                                          
 trains  are  so  constructed  that  they 
 have to follow  a set path. this path is 
 called a  "railway", which  is comprised 
 of two metal rails, hence  its nickname. 
                                          
 because  the  low  friction  between the 
 wheels of the train and  the rail metal, 
 there are limits for  how acute  a curve 
 can be, and even more so  for  how  much 
 the  ground  under  the  rails  can   be 
 sloped. thus a railway is often  not led 
 on top of  hills, rather through them in 
 tunnels  (if   they   are   large),   or 
            artificial chasms.            
                                          
 there  will  be trees on the side of the 
 rails, but  not too close,  or they will 
 be  cut  down by  the railway  janitors. 
 there  will  be  plains,  and  bodies of 
                  water.                  
                                          
 trains  go  by day and by  night.  along 
       the way, there is information      
 scattered, often put  on  top of  poles, 
 to be  interpreted by the train drivers. 
 different  parts  of  the  railway  have 
          different speed limits.         
                                          
 sometimes, trains  have to stop and wait 
 for something to happen, far  away. this 
 is  signaled by  red  or  green  lights. 
                                          
                                  
                                          
 many  people  follow  the rails by foot. 
 often  this  proves  to be  the  shorter 
 path  between  two  points. however this 
 is   frowned  upon,  and  very  impolite 
         toward the train drivers!